To build the Breakbeat Breadboard you can use either a breadboard or a Perma Proto board. The only real differences in the builds will be the use of optional header sockets for the Perma Proto build, and soldering wires to the Perma Proto instead of just poking wires into the breadboard.

Follow the diagrams here for either build.

Kee Boar Pins

Solder header pins to the Kee Boar (similar to this Feather configuration), then press it into the breadboard as shown in the diagram.

For the Perma Proto build you can solder the pins into the board or use optional header sockets as shown here.

Audio Noise Reduction

You'll build a small RC circuit to reduce some high end noise created by the PWM audio output of the board.

This consists of a ~1kΩ resistor and ~2.2µF electrolytic capacitor that cut high frequency signal. There is also a 220Ω resistor to help reduce pops when plugging the audio cable in or out.

This runs the filtered signal to the 3.5mm audio jack. Since we're using mono audio, the left and right channels of the TRS jack are jumpered together.

Note: Audio out on this project is LINE OUT level only, not AC-coupled for headphones, so is best used with powered speakers or an amplifier. It may drive small headphones, but not loudly.

Buttons

You'll add a set of eight tactile switches to trigger the different audio loops. These all run from individual GPIO digital input pins to ground on the KB2040.

Next, you plug in USB to power and program the Kee Boar, and then a 3.5mm stereo cable to an amplifier or powered speaker.

This guide was first published on Mar 19, 2022. It was last updated on Mar 19, 2022.

This page (Build the Breakbeat Breadboard) was last updated on Apr 22, 2022.

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